Faull. — Development of Ascus. 
Fig. 17. 
Fig. 18. 
Fig. 19. 
Fig. 20. 
Fig. 21. 
Fig. 22. 
Fig. 23. 
Fig. 24. 
Fig. 25. 
Fig. 26. 
Fig. 27. 
Fig. 28. 
Fig. 29. 
Fig. 30. 
Fig. 31. 
Fig. 32. 
Fig. 33. 
Fig. 34. 
Fig. 35. 
Fig. 36. 
Fig. 37. 
Fig. 38. 
Fig. 39. 
PLATE 8. 
Fig. 17-39, Hydnobolites sp. 
One of the spindles in figure 16. Late anaphase stage. Collapsed 
remains of the old nuclear wall still persists. 
Three of the four daughter nuclei in resting condition following 
second mitosis. Centrosomes are shown with two of them. 
Three of the four spindles of last mitosis. 
Spindle slightly younger than in figure 19, showing a mantle. 
Transverse section of top of ascus at end of last mitosis showing a 
polar view of five daughter nuclei. 
Intranuclear view of pole of the spindle of about the same age as in 
figure 19. 
Vertical section of nucleus of about the same age as in figure 21 or 
a little older. Spore plasm becoming differentiated in neighborhood 
of nucleus and the limiting layer beginning to form. Uppermost 
line represents wall of ascus. 
Older stage than in figure 23. Limiting layer not yet complete and 
nuclear wall hardly evident; dense protoplasm quite vacuolated. 
Polar view of about same age as in figure 23 or 24. 
Considerably later stage than in figure 24. Part of wall of ascus is 
drawn. The cylindrical nucleus is very obvious. The limiting- 
layer is completed and already the plasma membranes are half 
completed. 
Later stage than in figure 26. 
Same age as in figure 27. 
The plasma membranes are nearly completed. They are somewhat 
separated from one another at upper pole. 
Plasma membranes completed. 
Same as in figure 30. Spore beginning to round out. 
As in figure 31 the centrosome is distinct. Both nucleus and spore 
show a lengthening. 
A polar view of about the same age as in figure 29 or 30. The astral 
rays have never exhibited a tendency to fuse laterally. The plasma 
membranes are separated. 
Retraction of nuclear beak under way. 
Nuclear beak entirely retracted. 
Astral rays have disappeared. Centrosome is only occasionally 
demonstrable after beak has been withdrawn. Plasma membranes 
of spore and epiplasm are considerably separated at one side of spore. 
Nucleus of spore in a resting condition. Directly after this the 
spore begins to elongate. 
Longitudinal section of ascus at about the stage represented in figure 
29 showing relation of young spores to plasma membrane surround¬ 
ing dense protoplasm. 
Transverse section of upper part of ascus at same age and for same 
purpose as in figure 38. 
